REFRIGERATION APPARATUS, AND OUTDOOR UNIT OF REFRIGERATION APPARATUS

WIPO Patent Application WO/2023/175821

A1

A refrigeration apparatus (100) comprises: a first refrigerant circuit (1); a second refrigerant circuit (2); and control devices (7, 8). The first refrigerant circuit (1) circulates a first refrigerant and includes a first compressor (10), a first condenser (11), a heat exchanger (12), a first expansion valve (13), and a first evaporator (14). The second refrigerant circuit (2) circulates a second refrigerant and includes a second compressor (20) and the heat exchanger (12). The control device (7) causes the first compressor (10) to execute a first operation which is a pump-down operation or a pull-down operation. The heat exchanger (12) functions as a condenser in the first refrigerant circuit (1), and functions as an evaporator in the second refrigerant circuit (2). When the first compressor (10) is made to execute the first operation, the control device (8) causes the second compressor (20) to operate so that the evaporation temperature of the second refrigerant in the heat exchanger (12) reaches a target evaporation temperature. The target evaporation temperature is set so that the temperature of the second refrigerant flowing into the heat exchanger (12) becomes lower than the temperature of the first refrigerant flowing into the heat exchanger (12).

IUCHI HIROYA (JP)
ISHIHARA NOBUYA (JP)
YASHIRO TAKANORI (JP)

PCT/JP2022/012179

September 21, 2023

March 17, 2022

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MITSUBISHI ELECTRIC CORP (JP)

F25B1/00; F25B7/00

WO2014024837A1	2014-02-13
WO2014038028A1	2014-03-13
WO2017175299A1	2017-10-12

JP2000274849A	2000-10-06
JPH02192546A	1990-07-30
JP2014095514A	2014-05-22
JP2000105012A	2000-04-11

KISA PATENT & TRADEMARK FIRM (JP)

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